Viser treff 821-840 av 1513

    • M. Speight and P. Henderson : book review : Marine ecology : concepts and applications. 

      Jobling, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
    • Machine learning for classification of an eroding scarp surface using terrestrial photogrammetry with nir and rgb imagery 

      Bernsteiner, H.; Brozova, N.; Eischeid, Isabell; Hamer, A.; Haselberger, S.; Huber, M.; Kollert, A.; Vandyk, T. M.; Pirotti, F. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-03)
      Increasingly advanced and affordable close-range sensing techniques are employed by an ever-broadening range of users, with varying competence and experience. In this context a method was tested that uses photogrammetry and classification by machine learning to divide a point cloud into different surface type classes. The study site is a peat scarp 20 metres long in the actively eroding river bank ...
    • Macroalgae contribute to nested mosaics of pH variability in a subarctic fjord 

      Krause-Jensen, Dorte; Duarte, Carlos M.; Hendriks, Iris E.; Meire, L; Blicher, M.E.; Marba, Nuria; Sejr, Mikael K (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-19)
      The Arctic Ocean is considered the most vulnerable ecosystem to ocean acidification, and large-scale assessments of pH and the saturation state for aragonite (Ωarag) have led to the notion that the Arctic Ocean is already close to a corrosive state. In high-latitude coastal waters the regulation of pH and Ωarag is, however, far more complex than offshore because increased biological activity and ...
    • Macroalgal detritus and food-web subsidies along an Arctic fjord depth-gradient 

      Renaud, Paul; Løkken, Therese Smelnor; Jørgensen, Lis Lindal; Berge, Jørgen; Johnson, Beverly J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-05)
      Tight coupling between pelagic and benthic communities is accepted as a general principle on Arctic shelves. Whereas this paradigm has been useful for guiding ecological research, it has perhaps led to a disproportionate focus on POM and ice algae as the most likely sources of carbon for the benthic food web. Arctic shelves are complex systems, including banks, fjords, and trough systems up to 350 ...
    • Macrofauna and meiofauna food-web structure from Arctic fjords to deep Arctic Ocean during spring: A stable isotope approach 

      Oleszczuk, Barbara; Silberberger, Marc Jürgen; Grzelak, Katarzyna; Winogradow, Aleksandra; Dybwad, Christine Schumann; Peeken, Ilka; Wiedmann, Ingrid; Kędra, Monika (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-13)
      The knowledge on benthic trophic relations is particularly important for understanding the functioning of still pristine and less studied Arctic Ocean ecosystems. This study examines the benthic food-web structure in the European sector of the Arctic Ocean and assesses if and how it differs along depth gradients in the marginal seaice zone during spring. Samples of the sediment organic matter were ...
    • Macrozooplankton and micronekton diversity and associated carbon vertical patterns and fluxes under distinct productive conditions around the Kerguelen Islands 

      Cotté, C.; Ariza, A.; Berne, A.; Habasque, J.; Lebourges-Dhaussy, A.; Roudaut, G.; Espinasse, Boris Dristan; Hunt, B.P.V.; Pakhomov, E.A.; Henschke, N.; Péron, C.; Conchon, A.; Koedooder, C.; Izard, L.; Cherel, Y. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-13)
      Mesopelagic communities are characterized by a large biomass of diverse macrozooplankton and micronekton (MM) performing diel vertical migration (DVM) connecting the surface to the deeper ocean and contributing to biogeochemical fluxes. In the Southern Ocean, a prominent High Nutrient Low Chlorophyll (HNLC) and low carbon export region, the contribution of MM to the vertical carbon flux of the ...
    • Main risk factors associated with small and large ruminant brucellosis 

      Dadar, Maryam; Godfroid, Jacques Xavier Leon (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-22)
      Brucellosis is a neglected zoonotic bacterial disease in most of the developing world that has a significant impact on public health. The prevalence of brucellosis in livestock, particularly in large and small ruminants is variable in many countries and seems to remain high, especially amongst subsistence and small-scale livestock farmers. There are different factors that may influence the prevalence ...
    • The major threats to Atlantic salmon in Norway 

      Forseth, Torbjørn; Barlaup, Bjørn Torgeir; Finstad, Bengt; Fiske, Peder; Gjøsæter, Harald; Falkegård, Morten; Hindar, Atle; Mo, Tor Atle; Rikardsen, Audun H.; Thorstad, Eva Bonsak; Vøllestad, Leif Asbjørn; Wennevik, Vidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-03)
      Atlantic salmon (Salmo salar) is an economically and culturally important species. Norway has more than 400 watercourses with Atlantic salmon and supports a large proportion of the world’s wild Atlantic salmon. Atlantic salmon are structured into numerous genetically differentiated populations, and are therefore managed at the population level. Long-distance migrations between freshwater and ocean ...
    • Management decisions and knowledge gaps: Learning by doing in a case of a declining population of slavonian grebe Podiceps auritus 

      Stien, Jenny; Ims, Rolf Anker (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-01)
      Species of national conservation concern require management action to reduce the threat of extinction. As part of its obligations to reduce national loss of biodiversity, the Norwegian authority for nature management (Th e Norwegian Environment Agency) published an action plan in 2010 for one of these species, the Slavonian grebe Podiceps auritus . Th e American mink Neovison vison , a non-native, ...
    • Management of reindeer husbandry in Norway – power-sharing and participation 

      Ulvevadet, Birgitte (Journal article; Tidsskriftartikkel; Peer reviewed, 2008)
      Many governments have come to realize that the best way to manage natural resources is to include the resource users in order to increase legitimacy for governance. For the Sami reindeer industry, the Norwegian government has implemented two different management models in order to meet this challenge. On the one hand, there is a corporative management model where a few democratically elected reindeer ...
    • Mandibular shape in farmed Arctic foxes (Vulpes lagopus) exposed to persistent organic pollutants 

      Bradley, Madison M.; Perra, Megan; Ahlstrøm, Øystein; Jenssen, Bjørn Munro; Jørgensen, Even Hjalmar; Fuglei, Eva; Muir, Derek C.G.; Sonne, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-26)
      We investigated if dietary exposure to persistent organic pollutants (POPs) affect mandibular asymmetry and periodontal disease in paired male-siblings of Arctic foxes (<i>Vulpes lagopus</i>). During ontogeny, one group of siblings was exposed to the complexed POP mixture in naturally contaminated minke whale (<i>Balaenoptere acutorostarta</i>) blubber (n = 10), while another group was given wet ...
    • Mantle source heterogeneity in a Neoproterozoic back-arc basin: Geochemical and thermodynamic modeling of the volcanic section of Wadi Ghadir ophiolite, Egypt 

      Zoheir, Basem; Diab, Aliaa; Koutsovitis, Petros; Abu-Alam, Tamer; Feigenson, Mark; El-Bialy, Mohammed; Abdelnasser, Amr (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-02)
      Wadi Ghadir ophiolite in the Egyptian Eastern Desert, which forms the northern part of the Nubian Shield, is considered as one of the best-preserved segments of the Neoproterozoic oceanic lithosphere on Earth. Primary melt calculations and thermodynamic modeling of new geochemical data for the Wadi Ghadir pillow lavas and dike complexes, integrated with comprehensive petrographic investigations, are ...
    • The Map of Sea Turtle Rescue Centres in the Mediterranean 

      Ullmann, Judith; Stachowitsch, Michael; Ben Nakhla, Lobna; Boura, Liza (Conference object; Konferansebidrag, 2016-09-12)
    • MapMan4: a refined protein classification and annotation framework applicable to multi-omics data analysis. 

      Schwacke, Rainer; Ponce-Soto, Gabriel Y.; Krause, Kirsten; Bolger, Anthony; Arsova, Borjana; Hallab, Asis; Gruden, Kristina; Stitt, Mark; Bolger, Marie; Usadel, Björn (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-09)
      Genome sequences from over 200 plant species have already been published, with this number expected to increase rapidly due to advances in sequencing technologies. Once a new genome has been assembled and the genes identified, the functional annotation of their putative translational products, proteins, using ontologies is of key importance as it places the sequencing data in a biological context. ...
    • Mapping ecosystem services in the Arctic by cross-cultural PPGIS 

      Hausner, Vera Helene; Schmidt, Jennifer Irene; Ehrich, Dorothee (Conference object; Konferansebidrag, 2014)
    • Mapping species distributions: a comparison of skilled naturalist and lay citizen science recording 

      van der Wal, René; Anderson, Helen; Robinson, Annie; Sharma, Nirwan; Mellish, Chris; Roberts, Stuart; Darvill, Ben; Siddharthan, Advaith (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-27)
      To assess the ability of traditional biological recording schemes and lay citizen science approaches to gather data on species distributions and changes therein, we examined bumblebee records from the UK’s national repository (National Biodiversity Network) and from BeeWatch. The two recording approaches revealed similar relative abundances of bumblebee species but different geographical distributions. ...
    • Mapping the Historical Shipwreck Figaro in the High Arctic Using Underwater Sensor-Carrying Robots 

      Mogstad, Aksel Alstad; Ødegård, Øyvind; Nornes, Stein Melvær; Ludvigsen, Martin; Johnsen, Geir; Sørensen, Asgeir Johan; Berge, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-19)
      In 2007, a possible wreck site was discovered in Trygghamna, Isfjorden, Svalbard by the Norwegian Hydrographic Service. Using (1) a REMUS 100 autonomous underwater vehicle (AUV) equipped with a sidescan sonar (SSS) and (2) a Seabotix LBV 200 mini-remotely operated vehicle (ROV) with a high-definition (HD) camera, the wreck was in 2015 identified as the Figaro: a floating whalery that sank in 1908. ...
    • Marine artificial light at night: An empirical and technical guide 

      Tidau, Svenja; Smyth, Tim; Mckee, David; Wiedenmann, Jörg; D’Angelo, Cecilia; Wilcockson, David; Ellison, Amy; Grimmer, Andrew J.; Jenkins, Stuart R.; Widdicombe, Stephen; Queirós, Ana M.; Talbot, Elizabeth; Wright, Adam; Davies, Thomas W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-04)
      1. The increasing illumination of our world by artificial light at night (ALAN) has created a new field of global change research with impacts now being demonstrated across taxa, biological ranks and spatial scales. Following advances in terrestrial ecology, marine ALAN has become a rapidly growing research area attracting scientists from across all biomes. Technological limitations, complexities ...
    • Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard 

      Ericson, Ylva; Falck, Eva; Chierici, Melissa; Fransson, Agneta Ingrid; Kristiansen, Svein (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-05-04)
      The marine CO<sub>2</sub> system in Tempelfjorden (Svalbard) was investigated between August 2015 and December 2017 using total alkalinity, pH, temperature, salinity, oxygen isotopic ratio, and nutrient data. Primary production resulted in the largest changes that were observed in the partial pressure of CO<sub>2</sub> (<i>p</i>CO<sub>2</sub>, 140 μatm) and the saturation state of aragonite ...